The paper " Composition Corrosion Cells" is an outstanding example of a research paper on chemistry. Iron and other reactive metals are found in ores as oxides or sulfide compounds form. In order to achieve the pure iron element from these complexes, chemical processes are necessary. Iron and other metal widely used as construction material are very susceptible to corrosion or rusting. Corrosion can occur through either the electrolytic process or chemical action (oxygen). The aim of the first experiment is to determine if oxygen and water are both necessary for corrosion to happen.
The second experiment is aimed at understanding the corrosion of dissimilar materials. From the first tests; it is evident that oxygen and water are important for corrosion to occur. It is also evident the higher the electric potential exhibited by a material, the lower the chance of it being corroded. Introduction Rarely do we find elements in the pure metal state on the earth’ s crust before mining. Only gold and some platinum elements can be found as dust or lumps, lobes or alluvial deposits. Those metal found in these categories are generally not reactive to both oxygen and fallow with other metals.
Iron and other reactive metals are found in ores as oxides or sulfide compounds form. In order to achieve the pure iron element from these complexes, chemical processes are necessary. Some of these purification processes require a lot of energy for instance extraction of aluminum metal from bauxite ore. Iron and other metal widely used as construction material are very susceptible to corrosion or rusting. As indicated above corrosion can occur through either electrolytic process or chemical action (oxygen). In other cases, sulfate-reducing bacteria may produce sulphuric acid and in most conditions, corrosion can occur. The aim of experiment A is to determine if oxygen and water are both necessary for corrosion to happen.
In finding out, three tubes containing different mediums were set up and the objective was to determine under which condition corrosion occurs. Hypotheses for Experiment A The experiment seeks to ascertain either of the following hypotheses Ho: Water and oxygen are not necessary for corrosion to occur H1: water and oxygen is necessary for corrosion to occurs Materials and apparatus 3 Iron nails A 250ml glass beaker Hotplate Sandpaper Water Silica gel Procedure The experiment generally involved having three different mediums and dipping the nails in these separate mediums.
All the three nails were first cleaned with sandpaper to get rid of any deposit layers that could interfere with the results. Silica gel was put in a jar and one nail was placed inside. The jar was completely covered with the lid. Care was taken to make sure that the silica gel did not turn pink; a sign of absorption and hence contamination with water. The assembly was labeled as 1. The second assembly involved filling the second jar with tap water and placing the second nail inside; however, this jar was left open.
In the third assembly, water was boiled in a beaker for about 10 minutes. It was cooled slightly and poured in the third jar to about ¾ full. The third nail was finally placed inside and the stopper replaced. The jars were checked after one week.